Dumb-waiter.



No. 745,807. PATBNTED DEC. l, 1903. E. B. EVERINGHAM.

DUMB WAITER.

APPLICATION FILED 00T. 29, 1902. N0 MODEL. 3 SHEETS-SHEET l.

Witnesses. Inventor.

. ML WMM. @6W Wwf Neways Puurs fn, wovaufuo.. msnwaw, n r,

No. 745,807. PATENTBD DEG. 1, 1903. E. B. EVERINGHAM.

DUMB WAITBR.

APPLICATION FILED OCT. 2.9, 1902r N0 MODEL. 3 SHEETS-SHEET 3.

Witnesses. Inventor.

@mm B @2M/wf Z9. GSW

a 2 stom? No. 745,807. Fatented ecember 1, 1903.

UNTTED STATES PATENT OEEICE.

EDWARD B. EVERINGHAM, OF WARSAV, NEW YORK, ASSIYGNOR TO WAR- SAVFLEVATOR COMPANY, OF WARSAW, NEW YORK,

DUMB-WAITER.

SPECIFICATION forming part of Letters Patent No. 745,807, dated December1, 1903.

Application led October 29, 1902l Serial No. 129,234. (No model.)

To all whom t may Concern: 1 represents the dumb-Waiter or elevator Beit known that l, EDWARD B. EVERING- shaft; 2, the car; 3, thecounterweight, and HAM, a citizen of the United States, residing 4, therope or cable connecting the car to the at VarsaW, in the county ofWyoming and counterweight. 55 State of NewYork, have invented certainnew In the preferred type of clutch device a and useful Improvements inDumb-Waiters, shell 5 is keyed or otherwise secured to a shaft of whichthe following is a specification. 6 and drives a sleeve 70n said shaftby means This invention relates to an improved of lugs, which engagewith each other. In dumb-waiter which is arranged so that it is thepreferred construction two of these lugs 6o 1o automaticallyself-sustaining with either the (numbered 8) extend from the sleeve 7and fit car or the counterweight the heavier, a clutch between lugs 9,extending from the shell 5.

device being arranged so that it will operate is a ring which fitsloosely on the sleeve in either direction and will be moved into 7 andhas a seat 11 bored out to receive the clutching position to stop thecar by an indesteel bearing-rollers 12. 65 pendent reverse movement ofeither the car or A spider 13 is tted loosely on the sleeve 7, thecounterweight, according to which is the with its arms, preferably fourin number, heavier, the moment the hand-wheel ceases extending withinthe iiange 14 of the ring 10. to rotate. Two of the arms are made tocorrespond to One of the features of the invention has refthe lugs 8 onthe sleeve 7.and to engage be- 7o zo erence to the novel arrangement ofashell, so tween the lugs 9 on the shell. To the other that thehand-rope wheel can be secured to two arms segmental cams 15 are pivotedby any size car. screws or bolts 16. Each of these cams is pro- Theinvention also relates to certain details vided with a slot 17, whichengages with a pin of construction, all of which will be fully and 18,extending from ears 19, projecting from 75 clearly hereinafter describedand claimed,ref one end of the sleeve 7.

erence being had to the accompanying draw- The load-carrying sheave 2Ois keyed or ings, in whichotherwise fastened to the tubular sleeve 7Figure 1 is a section through a shaft, showbetween the roller-bearings12 and 2l. The ing a dumb-waiter and myimproved elevator front end ofthe sleeve 7 is bored to t the 8o' 3o mechanism. Fig. 2 is a centralvertical secshaft 6,which is long enough to extend through tion on linea a, Fig. 3, through my improved the entire mechanism and is supportedat one mechanism, the hand-rope wheel being omitend by a roller-bearing22, which is mounted ted. Fig. 3 is a vertical section on line b b, in abox 23, supported on one of the horizon- Fig. 2. Fig. 4 is averticalsection on line c c, tal frame-pieces 24, extending across the up- 85Fig. 8, the outer bearing being omitted. Fig. per portion of theshaft 1. The bearings 12 5 is a detached side elevation of one of theand 21 are also mounted in boxes 25 and 26, clutch-dogs. Fig. 6 is aplan view of the supported on the frame-pieces 24. i clutch'dog shown inFig. 5. Fig. fis an en- The shaft 6 is provided with a keyway or largeddetached front end view of the sleeve. longitudinal groove 27, whichextends nearly 9o 4o Fig. Sisahorizontal section on line d d, Fig. 3.throughout its length, so that the shell may The clutch mechanism inthis invention is be keyed at any point in its length and so arranged sothat it is inoperative so long as that a wheel 28, on which thehand-rope 29, the car is elevated or lowered by the handcontrolling thecar, is supported, may be rope andis brought automatically into actionmoved to permit the use of cars of different 95 by the independentmovement of either the sizes without any change in the mechanism.counterbalance-Weight or the car to stop the The operation is asfollows: The handcar and hold it in stationary position. This wheel 28and shell 5 being fast to the shaft provides an automatic clutch-lock,which 6 and the lugs 8, projecting from the sleeve, serves to preventthe car from either ascendbeing engaged in position between the lugs loo5o ing or descending when the hand-rope is re- 9 on the shell, thespider-arms carry the cams V lieved. 15, with their curvedclutching-faces, out of4 frictional engagement with the inner surface ofthe flange 14 of the ring 10 during the elevating and lowering of thecar by the handrope. XVhen the hand-Wheel stops, either the car or thecounterweight, according to which is the heavier of the two, descends bygravity and turns the sheave 2O and the sleeve 7 and moves the cam 15sufficiently to frictionally engage the inner surface of the [lange 14of the ring 10, and thereby automatically locks both the car and thecounterbalance- Weight against movement. The spring gives frictionenough to the spider 1-5 to hold it back when the sleeve moves tooperate the cams 15.

The curved gripping-face of the segmental cams may be provided with adovetail seat in which a friction-block 3l, of paper, ber, or othersuitable material, may be filled.

The chief advantages of this improvement reside in the manner in whichthe car is automatically locked by friction or self-sustained the momentthe hand-wheel ceases to move, by the independent descending movement ofthe car or counterbalance-Weight, the adj ustability of the hand-Wheelto permit the use of different sizes of cars With the same mechanism,and the general simplicity and small number of parts employed.

I claim as my invention- 1. In a device of the class described, a shaft,a car adapted to travel in the shaft, a counterbalance-Weight for saidcar, and friotion mechanism automatically operated by an independentmovement of the car or counterbalance-weight for locking said caragainst movement and comprising in part, a flanged ring, a spidersurrounded by the flange of the ring and cams pivoted to the spider andadapted to frictionally engage the flange of the ring, substantially asset forth.

2. In a device of the class described, an elevator-shaft, a car adaptedto travel in the shaft, a counterbalance-Weight for said car, operatingmechanism for raising or lowering the car, and friction mechanismautomatically operated by an independent movement of the car for lockingsaid car against movement, comprising a horizontal shaft, a shell rigidon said shaft, a sleeve loose on said shaft, a flanged ring loose on thesleeve, a spider loose on the sleeve with its arms extending Within theflange of the ring, and pivotal segmental cams pivoted to thespider-arms and adapted to frictionallyengage the ange of the ring,substantially as set forth.

3. In combination, a car, a counterweight for said car, means for movingsaid car and means for frictionally locking said car, including a shaft,a shell fast on the shaft, a sleeve loose on the shaft and controlled bythe shell, friction mechanism operated by the sleeve, a sheave mountedon the sleeve and a cable connecting the car to the counterweight andpasshing over the sheave, substantially as set fort .Y

4. In combination, a rotatable shaft, an elevator-shaft, a car, acounterweight, a sleeve loose on said shaft having twooppositely-extending lugs, a shell fastened to the shaft and having lugsbetween which the lugs of the sleeve engage, friction mechanism operatedbythe sleeve, a sheave mounted on the sleeve and a cable connecting thecar to the counterweight and passing over the sheave, substantially asset forth.

5. In combination, a rotatable shaft, an elevator-shaft, a car, acounterweight, a sleeve loose on said shaft having a plurality of lugs,a shell fastened to the shaft and having lugs with which the lugs of thesleeve engage, friction mechanism operated by the sleeve, a sheavemounted on the slee ve and a cable connecting the car to thecounterweight and passing over the sheave, substantially as set forth.

6. In a machine of the class described, an elevator-shaft, a car in saidshaft, a counter- Weight, a rope or cable connecting the counterweightto the car, a horizontal shaft crossing the upper portion of theelevator-shaft, a shell fast on the shaft and having lugs, a sleeveloose on the shaft and having lugs engaging With the lugs of the shell,aspider loose on the sleeve, a ring havinga flange surrounding thespider, segmental slotted cams pivoted to the spider and adapted tofrictionally engage the flange of the ring, and pins eX- tending fromthe sleeve and engaging in the slots in the cams.

7. In a machine of the class described, an elevator-shaft, a car in saidshaft, a counter- Weight, a rope or cable connecting the counterweightto the car, a horizontal shaft in the upper portion of theelevator-shaft, a handwheel on said shaft, a hand-rope engaging saidhand-wheel, a shell fast on the horizontal shaft, a sleeve loose on saidshaft, a spider, a friction-ring, segmental cams pivoted to the spiderand operated from the sleeve, and a sheave mounted on the sleeve overwhich the rope or cable connecting the car to the counterweight passes,substantially as set forth.

8. In a machine of the class described, an elevator-shaft, a car in saidshaft, a counterweight, a rope or cable connecting the counterweight tothe car, a shaft in the upper portion of the elevator-shaft, a shellfast on the shaft and having lugs, a sleeve loose on the shaft andhaving lugs engaging with the lugs of the shell, a spider loose on thesleeve, a ring having a flange surrounding the spider and segmentalslotted cams pivoted to the spider, said cams each having a curved paperfrictionblock adapted to frictionally engage the ange of the ring,substantially as set forth.

9. In a device of the class described, an elevator-shaft, a ear adaptedto travel in said shaft, a counterbalance-Weight for said car, aconnection between said car and said counterbalance-Weight,asupporting-shaft,a hand- Wheel on said shaft, a rope for operating saidhand-Wheel, and friction mechanism on said IOC IIO

shaft automatically operated by an indopendl connection with the sleeve,substantially as ent movement of the oar or oountorbalance set forth. tostop the car and including a sheave over which the connection betweenthe car and EDVARD B' EVERINGHAM counterbalance passes, a sleeve looseon the Vitnesses: shaft on which the shoave is supported, and a shellfast on the shaft and having friotional GEO. L. LONG, IRVING G.BoTsFoRD.

